WPA/WPA2: How the hash is generated

Hi

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Networks detected: 1BSSID=b4:ee:b4:fe:33:8b ESSID=HOTFiber-1255 (Length: 13)
--> STA=78:4f:43:10:7b:64, Message Pair=0, Replay Counter=0
--> STA=78:4f:43:10:7b:64, Message Pair=2, Replay Counter=0
--> STA=48:e9:f1:9d:73:97, Message Pair=0, Replay Counter=4
--> STA=34:fc:ef:de:aa:24, Message Pair=0, Replay Counter=4
--> STA=34:fc:ef:de:aa:24, Message Pair=2, Replay Counter=4
--> STA=48:e9:f1:9d:73:97, Message Pair=2, Replay Counter=0
Written 6 WPA Handshakes
Converted by hashC.co.uk
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FOUND 4 UNIQ HASHES:
16450dbe240e410657e933042e78cf3f:b4eeb4fe338b:48e9f19d7397:HOTFiber-1255
8955827633067ee56d0d81cb761071e2:b4eeb4fe338b:784f43107b64:HOTFiber-1255
d41217732a6a31f5735fc08065aaa885:b4eeb4fe338b:34fcefdeaa24:HOTFiber-1255
eb78f2dde751d67f6c00b9923e387e56:b4eeb4fe338b:48e9f19d7397:HOTFiber-1255


Question:
how those hashes:
16450dbe240e410657e933042e78cf3f
8955827633067ee56d0d81cb761071e2
d41217732a6a31f5735fc08065aaa885
eb78f2dde751d67f6c00b9923e387e56

are being generated?